Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A wireless transmit receive unit (WTRU), the WTRU comprising a processor configured to: receive a message comprising a DRX configuration from a base station, the DRX configuration comprising a first DRX cycle length, a second DRX cycle length, and an indication of a resume period, wherein the indication of a resume period indicates a number of DRX cycles at which the WTRU is to perform DRX using the first DRX cycle length prior to implicitly transitioning to performing DRX using the second DRX cycle length if no new transmissions are received; perform DRX using the first DRX cycle length; determine that the WTRU has performed DRX using the first DRX cycle length for the number of DRX cycles indicated by the resume period without receiving a new transmission; and transition the WTRU from performing DRX using the first DRX cycle length to performing DRX using the second DRX cycle based on determining that the WTRU has performed DRX using the first DRX cycle length for the determined number of DRX cycles indicated by the resume period without receiving a new transmission, wherein the second DRX cycle length is a multiple of the first DRX cycle length.
A wireless device (WTRU) adjusts its power saving (DRX) cycle based on inactivity. It receives a configuration from the base station specifying a short DRX cycle length, a longer DRX cycle length (which is a multiple of the first), and a "resume period". The device initially uses the shorter DRX cycle. If the device doesn't receive any new transmissions after the "resume period" (expressed as a number of short DRX cycles), it automatically switches to using the longer DRX cycle to save more power.
2. The WTRU as in claim 1 , wherein the processor is further configured to monitor a control channel for reception of downlink commands.
The wireless device (WTRU), as described above, also actively monitors a control channel to check for downlink commands from the base station. This allows the base station to override the automatic DRX cycle adjustments if needed, ensuring responsiveness even in power-saving mode.
3. The WTRU as in claim 1 , wherein a command received on a control channel causes the WTRU to change its DRX cycle length.
The wireless device (WTRU), as described in the first DRX control process, can change its DRX cycle length if it receives a command on the control channel. This provides the base station with dynamic control over the device's power saving behavior, enabling adjustments based on real-time network conditions and traffic patterns.
4. The WTRU as in claim 1 , further comprising performing DRX using the second DRX cycle length prior to performing DRX using the first DRX cycle length.
The wireless device (WTRU), as described in the first DRX control process, can initially begin with the longer DRX cycle length before switching to the shorter one. The device is configured to switch from the second DRX cycle length to the first DRX cycle length by receiving a trigger from the base station.
5. The WTRU as in claim 1 , wherein the message corresponds to a radio resource control (RRC) message, and the processor is configured to implement DRX operation at a Medium Access Control (MAC) level.
The wireless device (WTRU), as described in the first DRX control process, receives the DRX configuration information via a Radio Resource Control (RRC) message, which is part of Layer 3 signaling. The actual DRX operation, including cycle length adjustments and monitoring, is then implemented at the Medium Access Control (MAC) level (Layer 2). This separates configuration from implementation.
6. The WTRU as in claim 1 , wherein the message comprising the DRX configuration is received via higher layer signaling.
The wireless device (WTRU), as described in the first DRX control process, receives the DRX configuration from the base station through higher-layer signaling. This means the DRX configuration data is transmitted using protocols above the physical and MAC layers, such as RRC signaling, offering flexibility and control over DRX parameters.
7. The WTRU as in claim 1 , wherein the processor is configured to determine to refrain from transitioning to performing DRX using the second DRX cycle length on condition that the WTRU receives a subsequent message from the base station while performing DRX using the first DRX cycle length.
The wireless device (WTRU), as described in the first DRX control process, will not transition to the longer DRX cycle if it receives another message from the base station while using the shorter DRX cycle. This prevents the device from switching to the power-saving mode prematurely if there's ongoing communication.
8. The WTRU as in claim 7 , wherein the subsequent message is a command, and the WTRU is configured to operate using the first DRX cycle length based on the command.
The wireless device (WTRU) will continue to use the shorter DRX cycle based on receiving a command from the base station during the initial shorter DRX cycle period, preventing transition to the second DRX cycle. The command functions as a signal to override the implicit transition mechanism.
9. A wireless transmit receive unit (WTRU), the WTRU comprising a processor configured to: receive a message comprising a DRX configuration from a base station, the DRX configuration comprising a first DRX cycle length, a second DRX cycle length, and an indication of a resume period, wherein the indication of a resume period indicates a number of DRX cycles at which the WTRU is to perform DRX using the first DRX cycle length prior to implicitly transitioning to performing DRX using the second DRX cycle length if no new transmissions are received; perform DRX using the second DRX cycle length; receive a trigger; perform DRX using the first DRX cycle length based on receiving the trigger; determine that the WTRU has performed DRX using the first DRX cycle length for the number of DRX cycles indicated by the resume period without receiving a new transmission; and transition the WTRU from performing DRX using the first DRX cycle length to performing DRX using the second DRX cycle based on determining that the WTRU has performed DRX using the first DRX cycle length for the determined number of DRX cycles indicated by the resume period without receiving a new transmission, wherein the second DRX cycle length is a multiple of the first DRX cycle length.
A wireless device (WTRU) receives a configuration from a base station specifying a short DRX cycle length, a longer DRX cycle length (which is a multiple of the first), and a "resume period". The device initially uses the longer DRX cycle. Upon receiving a trigger signal, it switches to the shorter DRX cycle. If the device doesn't receive any new transmissions after the "resume period" (expressed as a number of short DRX cycles), it automatically switches back to using the longer DRX cycle to save power.
10. The WTRU as in claim 9 , wherein the second DRX cycle length is an integer power of two multiple of the first DRX cycle length.
The wireless device (WTRU) utilizes a longer DRX cycle length that is a power of two multiple of the shorter DRX cycle length. For instance, if the short cycle is 2ms, the long cycle could be 4ms, 8ms, 16ms, and so on.
11. The WTRU as in claim 9 , wherein the first and second DRX cycle lengths are selected from a set of DRX cycle lengths given by the equation DRX-cycle-len =L×2 n , wherein n=0, 1, 2, . . ., and L is the length of a shortest DRX cycle.
The wireless device (WTRU) selects both the short and long DRX cycle lengths from a set of possible values, defined by the formula DRX-cycle-len = L * 2^n, where 'L' is the length of the shortest possible DRX cycle, and 'n' is an integer (0, 1, 2, ...). This limits the available choices to specific power-of-two multiples of a base value.
12. The WTRU as in claim 9 , wherein the second DRX cycle length is twice the first DRX cycle length.
The wireless device (WTRU) configured for DRX cycle adjustment uses a longer DRX cycle that is exactly twice the length of the shorter DRX cycle.
13. The WTRU as in claim 9 , wherein the resume period is synchronized with a base station.
The wireless device's (WTRU) "resume period" (the number of short DRX cycles to wait before switching to the longer cycle) is synchronized with the base station. This ensures both the device and the base station have a consistent understanding of when the transition to the longer DRX cycle should occur.
14. The WTRU as in claim 9 , wherein the processor is further configured to monitor a control channel for reception of downlink commands.
The wireless device (WTRU), as described with DRX cycle adjustments, also actively monitors a control channel to check for downlink commands from the base station. This allows the base station to override or modify DRX behavior, enabling dynamic control and adaptation to varying network conditions.
15. The WTRU as in claim 9 , wherein a command received on a control channel causes the WTRU to change its DRX cycle length.
The wireless device (WTRU), as described with DRX cycle adjustments, is capable of changing its DRX cycle length upon receiving a command through the control channel. This enables the base station to actively influence the device's power saving mode.
16. A method implemented by a wireless transmit receive unit (WTRU), the method comprising: the WTRU receiving a message comprising a DRX configuration from a base station, the DRX configuration comprising a first DRX cycle length, a second DRX cycle length, and an indication of a resume period, wherein the indication of a resume period indicates a number of DRX cycles at which the WTRU is to perform DRX using the first DRX cycle length prior to implicitly transitioning to performing DRX using the second DRX cycle length if no new transmissions are received; the WTRU performing DRX using the second DRX cycle length; the WTRU receiving a trigger; the WTRU performing DRX using the first DRX cycle length based on receiving the trigger; the WTRU determining that the WTRU has performed DRX using the first DRX cycle length for the number of DRX cycles indicated by the resume period without receiving a new transmission; and the WTRU transitioning performing DRX using the first DRX cycle length to performing DRX using the second DRX cycle based on determining that the WTRU has performed DRX using the first DRX cycle length for the determined number of DRX cycles indicated by the resume period without receiving a new transmission, wherein the second DRX cycle length is a multiple of the first DRX cycle length.
A wireless device (WTRU) performs DRX cycle adjustment. It receives a configuration from a base station specifying a short DRX cycle length, a longer DRX cycle length (which is a multiple of the first), and a "resume period". The device initially uses the longer DRX cycle. Upon receiving a trigger signal, it switches to the shorter DRX cycle. If the device doesn't receive any new transmissions after the "resume period" (expressed as a number of short DRX cycles), it automatically switches back to using the longer DRX cycle to save power.
17. The method as in claim 16 , wherein the second DRX cycle length is an integer power of two multiple of the first DRX cycle length.
The method of DRX cycle length control wherein the longer DRX cycle length is an integer power of two multiple of the shorter DRX cycle length. For instance, if the short cycle is 2ms, the long cycle could be 4ms, 8ms, 16ms, and so on.
18. The method as in claim 16 , wherein the WTRU monitors a control channel for reception of downlink commands.
In the DRX cycle length adjustment method, the wireless device (WTRU) monitors a control channel for reception of downlink commands. The monitoring allows the base station to provide dynamic commands to the WTRU and control DRX behavior.
19. The method as in claim 16 , wherein a command received on a control channel causes the WTRU to change its DRX cycle length.
In the DRX cycle length adjustment method, a command received on the control channel causes the wireless device (WTRU) to change its DRX cycle length. The command gives the base station an explicit way to control DRX.
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August 29, 2017
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